Antitheft alarm device



Dec. 27, 1927.

J. NAWARYN'SKI Filed April 18. 1927 TTORNE Y INVEN'TOR ANTITHEFT ALARM DEVICE Patented Dec. 27, 12.27.

stares JUHN NA'WABYNSKI, 0F CLEVELAND, OHIO.

ANTITHEFT ALARM DEVICE.

Application filed April 18,

dow vention;

2 i a vertical fragmentary sectional view of a vindow sash and a window frame embodying my invention;

3 is a side elevational View oi the window frame shown in rig. 2.

41 Y a side elevational view of the e c own in Fig.2; and

= rticularly to the drawing ral 1O desi' nates a window frame and the numeral 11 designates a window sash. The window sash 11 is provided with a recess in the vertical edge 13 thereof. The reccss 12 is cor ed between the inner and outer surfaces of the trams 11 and has an irregular haclr, the lower portion of the reccss being extended further into the trams than the higher portion thereof. A resilient strip member is rigidly secured at its upper-end the cash 11 by the screw 15. The resilient strip 14 is depended clownwardly into the enlarged lower portion of the recess 12. 0n the lower end of the strip 1 1 are mounted spaced bearing members 16 and 17 having openingstherein in which a pin 18 is rigidly secured. A roller 19 is rotatively mounted on the pin 18.

The frame 10 is provided with an elongated recess 20 extending through from side to side thereof. A vertical partition 21 having a vertically disposed slot 22 therein is disposed in the recess 20 and extends the entire length thereof. A block 23 comprising screw-threaded extensions 24 is slidahly mounted in leftside of the partition 21 as viewed in Fig. 2. Longitudinal slots 25 and 26 spaced on opposite sides of the slot 22 are provided in the partition 21 to receive the screw-threaded extensions, 2 t. lhuinlo screws 27 are screw threaded in the extension strip Y28 and the roller .19

' ll 1 S151 1927. Serial ND. 134,455.

24 for clamping the block 28 firmly against the partition 21 in a desired vertical posi tion. A resilient lever orspring strip 28 is rigidly mounted at one end on the block '23 andengagesone endot a pin 24: slidahlv mounted in an openin in the block 23 and is extended at its other end through therecess 22 in the partition 21. he end of the pin 2 1' engages one so ace of the spring engages the opposite su thereof-as shown in Fig. 2. It should he understood thattl e spring strip the w dow is urged in the direction strip 28 oil the window frame hya 1 1 mounted at one end in a the recess 12. should also he uncerstocd that the spring strip 28 is mountd. in the path of the roller 19 and that the U16. oi the stripis dis osed in the men of the roller. Spacedcontact members 29 and 30 com- 3; st? ntially resilient clementsare med ithe recess 20 in registration with udinal opening 22 in the parti- Thecontact members 29 and 30 are viced witha plurality of spaced apart,

As shown in 1, a conductor 34: is electri ally connected at one end to the contact strip 30 and at the other end to one. terminal of the hell 35 the other terminalv oi the hell losing electrically connected with one terminal of source of power such asa'hattery 36. The contact 1 29 is electrically connector with the other terminalot the battery by a conductor 3?. The spaced contact members 29 and 30 normally tend to remain in parallel planes and are electrically insulated from each other. The outer end 38 of the pin 24 engages the contact strip 29 and deflects the latter as shown in Fig. 2 when the pin is pressed inwardly by the strip 28 when the roller 19 engages the free end portion thereoet. The contact strip 29 is provided at its upper end with a curved port-ion 39 which permits outward movement of the portion of said strip intermediate the ends thereof.

The slidalole block 23 may be secured in any desired position in the recess 20 for predetermining the height to which the window must he raised to actuate the alarm mecha it should he understood that the block 23 may be clamped against the parti tion 22 by the thumb screws 2?. then the it U llt 

